html, body {height: 100%;}

.container-screen-size
{
    min-height: 520px;
    min-width: 720px;
}

.footer{
    position: fixed;
}

.scroll-panel{
    height:80%;
    overflow-y:scroll;
}

.centered-by-content {
    margin: auto;
    display: table;
}

.container-x {
  display: table;
  table-layout: fixed;
  width: 100%;
}

.scroll-x {
  display: table;
  overflow-x: auto;
  width: 100%;
}